ML022630113

NRC Administrative Topics Questions: Calculate Exposure Stay Times

ML022630113
Person / Time
Site:	Summer
Issue date:	09/16/2002
From:	NRC/RGN-II
To:
References
FOIA/PA-2002-0371
Download: ML022630113 (6)

Text

0 V. C. SUMMER NUCLEAR STATION NRC ADMINISTRATIVE TOPICS QUESTIONS CALCULATE EXPOSURE STAY TIMES Revision 0 V

0 0 Student Handout Sheet QUESTION 1 The plant has experienced a Loss of Coolant Accident with indications of failed fuel. The OEC Coordinator is directed to start the BRAVO hydrogen recombiner. Three operators are available to perform this operation. Operator 1 has an accumulated total dose for the year of 400 mrem, operator 2 has an accumulated total dose for the year of 800 mrem, and operator 3 has an accumulated total dose for the year of 275 mrem. Transit time to the hydrogen recombiner is 12 minutes. General area dose rates along the transit route are 200 mr/hr with dose rates at the recombiner control panel indicating 450 mr/hr. Calculate the available stay time for each of the three operators at the recombiner control panel based on VCS administrative exposure control limlits.

RETURN THIS SHEET TO YOUR EVALUATOR WHEN YOU FEEL THAT YOU HAVE SATISFACTORILY COMPLETED THE ASSIGNED TASK

0 S QUESTION 1 The plant has experienced a Loss of Coolant Accident with indications of failed fuel. The OEC Coordinator is directed to start the BRAVO hydrogen recombiner. Three operators are available to perform this operation. Operator 1 has an accumulated total dose for the year of 400 mrem, operator 2 has an accumulated total dose for the year of 800 mrem, and operator 3 has an accumulated total dose for the year of 275 mrem. Transit time to the hydrogen recombiner is 12 minutes. General area dose rates along the transit route are 200 mr/hr with dose rates at the recombiner control panel indicating 450 mr/hr. Calculate the available stay time for each of the three operators at the recombiner control panel based on VCS administrative exposure control limits.

ANSWER 1 Administrative annual dose = 1000 mrem Transit Dose ........ 12/60=0.2hrs x 2 trips x 200mr/hr = 80 mr Operator-l stay time = 1000-400=600-80=520/450=1.16 hrs (lhr & 9/10 min)

Operator 2 stay time = 1000-800=200-80=120/450=0.27 hrs (16/17 min)

Operator 3 stay time = 1000-275=725-80=645/450=1.43 hrs (lhr &

25/26 min)

Student Handout Sheet QUESTION 2 Given the attached survey maps, identify any appropriate postings that should be applied to the areas shown.

RETURN THIS SHEET TO YOUR EVALUATOR WHEN YOU FEEL THAT YOU HAVE SATISFACTORILY COMPLETED THE ASSIGNED TASK

QUESTION 2 Given the attached survey maps, identify any appropriate postings that should be applied to the areas shown.

ANSWER 2 Entire area of room 12-26 should be posted as HIGH RADIATION AREA Entire area of room 12-14 should be posted as RADIATION AREA Area inside floor dam of evaporator in room 12-14 should be posted as a CONTAMINATED AREA

4I -

SURVEY # ,vec. igd2hV SWP /RWP#_____

AB 12-26 MISCELLANEOUS WASTE EVAPORATOR AB 12-14 RECYCLE EVAPORATOR Z POWER S

2 COUNTER: SER.lI INST. TYPE: SER.

CONTAMINATION IN DPM/100 CM :

I s300 B /0 O 15 22 29 COUNTER: SER.0 INST. TYPE: SER.J/

2 ,00 9 ?D 0 16 23 _ 30 COMMENTS: SURVEYED BY:

3- 750- 10 LIDO 17 24 ,31 TIME: DATE:

4 .1//0 0 18.______ 25 _32 REVIEWED BY:

51 Z IC/& 1121 19233 6TIME: DATE:

6 1 ...oo 13 1201 27 34 7 1500 14 121 128 135' DENOTES CONTACT READINGS, ALL OTHERS IN mR/hr UNLESS OTHERWISE NOTED (Beta/Gamma)